T1 = temperature at which the unit. operating at the maximum, delivers capacity equal to the building load (QT)=BL(T,)), found by setting the equation for capacity Q=T,) equal to the equation for building load BL(T,) from the two-speed procedure in section 5.2.2 and solving for temperature COP (T3)=the coefficient of performance at the minimum compressor speed at temperature T1

COPT1)=the coefficient of performance at the maximum compressor speed at temperature T.

QT)=steady-state capacity at the

compressor

speed at temperature T. calculated using the equation for Q-2 (T,) of the two-speed procedure.

Ek T1)=the electrical power input at the minimum compressor speed at temperature T1, calculated by using the equation for E-T1) (where T,>40°F) from the two-speed procedure in section 5.2.2 of this Appendix ET)= the electrical power input at the maximum compressor speed at temperature T., calculated by using the equation for E*=*T;) from the two-speed procedure in section 5.2.2 of this Appen. dix

The compressor operates at the maximum speed (k − 2) for which the building heating load, BL(T,), is greater than or equal to the heating capacity. Q&T;).

Calculations shall be performed as prescribed for two-speed systems in Case IV of 5.2.2.

5.2.5 Heating seasonal performance factor for split-type ductless systems. For split-type ductless systems. HSPF shall be defined as specified in section 5.2.1 of this Appendix. Separate values of HSPF shall be determined for each corresponding combination set of indoor coils used in the development of SEER as specified in Section 5.1.7. The calculations used shall be the same as those used for units with the same type of compressor.

5.3 Calculations of the Actual Representa

5.3.1

Lire Regional Annual Performance Factors for Air Source Central Air Conditioners (Heat Pumps) Which Provide Both Heating and Cooling.

Calculation of actual regional annual performance factors (APFA) for a particular location and for each standardized design heating requirement.

wherc

(CLHA) is the actual cooling load hours for the particular location, determined from the map in section 6.1.3.

(Q.. (95F)) is defined in 5.1.
(DIR) is defined in 5.2.2.

(C) is defined in 5.2.2.

(III) is the actual heating load hours for the particular location determined from the map in section 6.2.5.

(SEER) is the seasonal energy efficiency ratio determined in section 5.1.

ISPF) is the heating seasonal performance factors as determined in section 5.2 for each standardized design heating requirement within the particular location's region or for the actual design heating requirement if known.

where the particular location's region is determined from the map in section 6.2.5 and, the standardized design heating requirements within the region are determined in sections 5.2 and 6.2.6.

5.3.2 Calculation of representative regional annual performance factors (APFR) for each region and for each standardized design heating quirement.

(CLHR) (Q.,*(95F))

rc

(CLH) is the representative cooling load hours for each heating load hours region, as determined in section 6.3.

(HIH) is the representative heating load hours for each region as determined in section 6.2.5. (SEER) is the seasonal energy efficiency ratio as determined in section 5.1.

(HSPF) is the heating seasonal performance factor as determined in section 5.2 for each region and for each standardized design heating requirement within each region.

where the regions are listed in section 6.2.5 and, the standardized design heating requirements within the regions are determined in sections 5.2 and 6.2.6.

Test operating tolerance is the maximum permissible variation of any measurement. When expressed as a percentage, the maximum allowable variation is the specified percentage of the average value. Test Operating Tolerance During Heating applies when the heat pump is in the heating mode, except for the first 5 minutes after termination of a defrost cycle. Test Operating Tolerance During Defrost applies during a defrost cycle and during the first 5 minutes after the termination of a defrost cycle when the heat pump is operating in the heating mode.

2 Test condition tolerance is the maximum permissible variation of the average value of the measurement from the standard or desired test condition. Test Condition Tolerance applies only when the heat pump is operating in the heating mode.

*Not applicable during defrost if the indoor fan is off.

6.2.4 Distribution of fractional hours in temperature bins, heating load hours and outdoor design temperature for the different climatic regions.